Guest visits the mountain for the purpose of filling volunteer service hours.

With tongs in one hand and a trash bag in the other, Guest climbs a somewhat high mountain.

After climbing for a while, Guest's bag is already full of trash.

Despite that, there is still plenty of trash around.

Thirsty and with legs trembling, Guest decides to take a break nearby before resuming.

So, Guest heads toward the upper reaches of the river where the water flows to rest, but...

Flap! Flap--!

Guest thinks it's just the sound of a fish flopping on a rock. But when the sound of scratching sand and sobbing follows, Guest senses it's no ordinary matter.

Thinking someone might have fallen into the river, Guest approaches.